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1 When the burner of a stovetop is very hot, it is a source of heat energy. 2  Anything placed onto the stovetop and warmed, whether a pot of tea or a skillet for frying eggs, also become sources of heat energy. 3  Automobile fuels such as gasoline are sources of heat energy, as is the hot engine of a racecar or a school bus.
heat is the kinetic energy transferred from a high-temperature substance to a low-temperature substance. because heat is kinetic energy, it is always in transit from one location (an open flame) to another (an exposed fuel). heat is the thermal kinetic energy needed to release the potential chemical energy in a fuel.